Overview Of Recorded Streams; Overview Of Stream Playback; Transport Protocols Used For Streaming - Extron electronics VNR 100 User Manual

Overview of Recorded Streams

Encoders convert video signals to highly compressed signals that can be transferred over a
network.
•
•
•

Overview of Stream Playback

•
•
•
•
Decoders take the highly compressed signals from the network and reconvert them to the
uncompressed format required by a display device.

Transport Protocols Used for Streaming

Source data from a VN-Matrix encoder can be distributed to multiple displays or decoders
(one-to-many) or to a single display or decoder (point-to-point). A previously recorded
stream can be distributed in the same way and, as the source of an encoded stream, the
recorder may be thought of as an encoder in this context.
A stream may be transported over the network from the source (encoder, recorded stream)
to the display (decoder) using one of three methods:
•
•
•
By default, the VNR 100 recorder provides a choice of unicast RTP or unicast TCP transport
protocols. A multicast transport protocol may be configured if required (see the Enterprise
Controller User Guide).
NOTES:
The VNR 100 records the compressed signals from the network, without further
processing.
As a minimum, each recording contains a video element.
A recording may also include elements containing audio, data, and whiteboard
information (if these are present and enabled at the encoder). If these are selected for
storage, each element is stored as an individual file within the same directory.
The VNR 100 plays back saved data without processing. It is already in a highly
compressed format that can be transferred over a network.
When a recording that contains multiple elements is selected for playback, all the
necessary files are loaded.
The video content is always played back.
When present, audio, data, and whiteboard elements may be enabled or disabled for
playback. If they are enabled, the audio, whiteboard, and data elements are always
slaved to the video stream.
Multicast Real-time Transport Protocol (RTP)
Unicast Real-time Transport Protocol (RTP)
Unicast Transmission Control Protocol (TCP)
• During playback of a recorded stream, the transport protocol can be TCP, RTP, or
RTP Multicast. The protocol is specified on the VNM Enterprise Controller.
• When a stream is recording, the VNR 100 may be considered as a display
(decoder) device.
VNR 100 • Introduction 3